Adding instrumentation tests for the search engine logo feature

Bug: 1032236
Change-Id: I5f80fb7c33158e39b17ff0947f1fa239929815b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1958808
Commit-Queue: Brandon Wylie <wylieb@chromium.org>
Reviewed-by: Ender <ender@google.com>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726096}

chrome/android/java/src/org/chromium/chrome/browser/omnibox/status/StatusViewCoordinator.java

@@ -158,9 +158,7 @@ public class StatusViewCoordinator implements View.OnClickListener, TextWatcher
         return mMediator.isSecurityButtonShown();
     }
 
-    /**
-     * @return The ID of the drawable currently shown in the security icon.
-     */
+    /** @return The ID of the drawable currently shown in the security icon. */
     @DrawableRes
     public int getSecurityIconResourceIdForTesting() {
         return mModel.get(StatusProperties.STATUS_ICON_RESOURCE) == null
@@ -168,6 +166,13 @@ public class StatusViewCoordinator implements View.OnClickListener, TextWatcher
                 : mModel.get(StatusProperties.STATUS_ICON_RESOURCE).getIconResForTesting();
     }
 
+    /** @return The icon identifier used for custom resources. */
+    public String getSecurityIconIdentifierForTesting() {
+        return mModel.get(StatusProperties.STATUS_ICON_RESOURCE) == null
+                ? null
+                : mModel.get(StatusProperties.STATUS_ICON_RESOURCE).getIconIdentifierForTesting();
+    }
+
     /**
      * Update visibility of the verbose status based on the button type and focus state of the
      * omnibox.